. >> jack kennedy was a friend of mine. senator, you're no jack kennedy. (cheer (cheers) >> that was a fierce moment. >> that was a strong zinger and perhaps the most memorable moment from the vice-presidential debate and often, a vice-presidential debate is about assurance. can the second person on the ticket become president and step in if need be. you've got to remember in 1988 who was president? ronald reagan. lloyd benson had been in the senate 17 years, dan quayle, 7 years, that was about gravitas and the senior statesman versus the young new guy upstart. this time it's different because barack obama was in his 40's when he became president and even though joe biden is three decades older than paul ryan, that issue is muted a little bit. >> clayton: interestingly in 2008. then candidate biden, vice-presidential nominee at the time had a walk a delicate balance with sarah palin. he had to be respectful of her on the stage and strong a lot of people thought it was a tie at theened of the debate wherever you stand on it want matter, but here is a clip f